Architect and engineer, born in Paris in 1755. He was a lieutenant in the French provisional service, and came to this country with the Marquis de Lafayette in 1777. He entered the Continental Army in the autumn of that year as an engineer, was made captain, 18 February, 1778, and at the siege of Savannah was wounded and left on the field. He afterward served under the immediate command of George Washington, became a major, 2nd May 1783, was employed as an engineer at Fort Mifflin in 1794, and appointed professor of engineering at the United States military academy in July 1812, but declined. He drew the plan for the city of Washington, for which he received $3,800 (substantially less than the $95,000 he felt he deserved), and was architect of some of its public buildings. He designed a dwelling for Robert Morris in Philadelphia on such a scale that the latter could not afford to complete it. He died in poverty in 1825, Prince Georges County, Maryland. In 1909 his remains were exhumed and transferred to Arlington National Cemetery, after lying in state at the US Capitol Rotunda.